I’ve bought my entire setup used hahaha. Prob not the best but it’s been working since so fingers crossed but I found 2x16tb exos for $100/each and was lucky to snap up a QNAP TS451+ (4bay) used for under $50. Also grabbed 2x3.84TB SSD (Samsung enterprise grade with less than 100 hours each for $150/piece). I feel as long as you can find lightly used, you can’t go wrong!